| A | B |
|---|
| Nucleons are the | things in the nucleus (protons + neutrons) |
| Atoms are elctrically neutral | because protons equal electrons |
| The mass number of an atom written in notation | is the top number |
| What is the total number of electrons if atomic # is 17 and mass is 35? | 17 electrons |
| An amu equals | 1/12 of a carbon-12 atom |
| If an atom gains neutrons in its nucleus, the atomic number | stays the same |
| What is the nuclear charge of an atom with a mass of 20 and an atomic number of 10? | +10 |
| Rutherford discovered the atom has a dense positive nucleus and | is mostly empty space |
| The mass of an electron is | 1/1836 of a proton |
| In all samples of Calcium, each atom has | 20 protons |
| The # of protons in an atom of Argon | 18 protons |
| What is the mass of an atom that has 17 protons, 17 electrons & 18 neutrons | 35 amu |
| What particle is neutral? | neutron |
| Atomic number is always equal to the | number of protons |
| As the number of neutrons in an atom increases | the nuclear charge remains the same |
| The nuclear charge is positive and equal to | the number of protons |
| The total mass of protons in Rb-86 | 37 amu |
| The nucleus contains most of the atom's | mass |
| What is the toal number of nucleons in Au-198 | 198 nucleons |
| An ion with 9 protons, 10 neutrons and a charge of -1 has an atomic # of | 9 |
| What particle has the same mass as a proton? | a neutron |
| What is the # of neutrons in the atom Rb-86 | 49 neutrons |
| What is the mass if the atom has 5 protons 5 electrons and 6 neutrons? | 11 amu |
| What atom has a nucleus with 9 protons and 10 neutrons? | Flourine |
| What is the possible mass of magnesium? | 24 |
| The nucleus of carbon has a charge of | +6 |
| How is the # of neutrons determined | Atomic mass - Atomic number |
| The particle with the smallest mass is the | electron |
| Which element in Group 1 has the greatest nuclear charge? | Francium |
| Compared to the whole atom, the nucleus is | smaller and contains most of the mass |
